Boiler-furnace



(No Model.)

' A. BACKUS, Jr.

BOILER FURNAGE. NO- 333,462` Patented Mar. 23, 1886::

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WW/ @1Q/# Att-orney Unire;

Parent erica.

ABsALon BAoKUs, JR.,

OF DETROIT, MICHIGAN.

BOILER-FURNACE.

To all whom, it may concern:

Be it known that I, ABSALOM BAOKUS, Jr., of Detroit, county of Wayne,State of Michigan, have invented a new and useful Improvement inBoiler-Furnaces; andl do here by declare the following to be afull,clear,and exact description of the same, such as will enable othersskilled in the art to which it pertains to make and use it, referencebeing had to the accompanying drawings, which form a part of thisspecification.

The object of my invention is toV provide an improved furnace designedto secure a more thorough combustion ofthe coal,thereby economizing thefuel, preventing smoke, and securing the most thorough utilization ofthe heat.

My invention consists in the combination of devices and applianceshereinafter specified, and more particularly pointed out in the claims.

In the drawings, Figure 1 is a longitudinal section of a deviceembodying my invention. Fig. 2 is a front section.

l carry out my invention as follows: A represents a boiler; B, thecombustion-chamher; C, a rear bridge-wall; D, asmoke-fiue; E.thestationary grate supported upon cross-bars e e', or otherwise.

F is a dumping-grate in the rear of the stationary grate, said gratebeing pivoted at its rear end, as shown atf.

F is a knee-joint lever having a pivotal connection with the front endof said dumpinggrate, and provided with an operating-bar,G, theconstruction being such that when said lever is forced inward the gratewill assume the position shown in dotted lines, Fig. l. It is obviousthat by the use of this dumpinggrate in the rear of the grate E theclinkers may be readily removed without disturbing the operation of thefurnace,or impairing the combustion of the fuel, the elinkers beingcrowded to the rear end of the stationary grate,where they readily fallinto the ash-pit H when the rear grate is dumped.

I is the front wall of the combustion-chainber; J, a door through whichfuel may be fed to the grate.

K is my improved arch, located in the front Patent 310.338.462, datedMarch 23, 1886.

. Serial No. 173,852. (No model.)

l of the combustion-chamber, between the grate andthe boiler-dividingthe combustionchamber, so as to form a coking-oven, B', in the frontthereof, into which the fuel first enters, and after being coked thereinis forced back upon the rear of the stationary grate, where the processof combustion is completed. The location ofthis arch above the frontportion of the grate in the combustion-chamber obviously confines thevolatile products of combustion upon the fuel-bed, and thereby securesthorough combustion, preventing the escape of smoke, the waste of fuelthereby, and the `annoyance arising therefrom. The arch K is inclinedfrom the front toward the rear, so as to narrow the throat at its rearend between the eokingoven and the rest of the combustiori-chamber andsecure the thorough combustion of the fuel gases. At the same time theinclined arch K prevents cold air from coming in Contact with the boilerwhen the door is opened for the admission of fuel, or otherwise, andtheheated air is permitted to circulate in the combastion-chamber abovesaid arch and under the boiler.

The combustiori-chamber is preferably provided with a longitudinaldivisionwall, L, dividing the combustion-chamber into two compartments,each provided with an inclined arch, K, said arches being supported attheir inner edges upon the wall L andupon their outer edges upon theside walls of the eomhustioirchamber.

The draft for the combustionchamber may be secured in any desired way.

I have found that the fuel-doors may be loft open or adjusted to permitthe entrance of air first to the cokingchamber with good results.

Thisinclincd arch K may be built in anysuitable1nanner-as,forinstance,ofarch-brick, although I do not confinemyself thereto, nor to any particular manner of supporting the same inthe combustionchamber. The front of said inclined arch K abut-s againstthe front wall, I, although it may be extended downward in the rear ofthedoor. The front \vall,I,sup ports the forward end of the boiler, thecombustion-chamber being located entirely underneath theboiler,cokingoven, and all. The

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front door to the combustion-chambcrmay be left aj ar to furnish draft.

By the construction of the grates above dcscribed no cooling of thecombustion-chamber takes place in clearing the grates.

I am aware that heretofore a dcliector and spark-arrester have beenused, consisting of a cu rved or arched roof to the combustion-chamber,having longitudinal and transverse communicating passages, andcoveringthe enti re chamber, excepting a limited passage for theproducts of combustion at the upper forward end ofthe chamber. This isnot my invention and could not serve the purpose I attain. Bythusloeating the arch welldown and inclining it downward from the doorto its extremity it does not obstruct the direct radiation from the bedof fuel up against the forward end of the boiler, whereas if it werelocated high up it would be interposed, and therefore cut ot'f aconsiderable surface from such direct radiation. At the same time thelow situation and incline of the arch presents its bricks or material toastrong heat on top and its under surface into close contact willi thefuel so that the arch thus highly heated radiates its heat directlyagainst the contained fuel and greatly facilitates the colring process.This highly-heated arch also radiates its heat up against the surface ofthe boiler and serves to maintain a strong and substantially uniformheat during the period of charging. The construction also operates tohighly heat the incoming air before it emerges into thecombustion-chamber, and as it is obliged to traverse the Whole length ofthe arch irnmediately on the surface or throughthe body of the fuel itis thoroughly commingled with the products of combustion that are givenot'f from the fuel.

I am aware of the patent to J. T. Rich, November 1, 1870, No. 108,985,and J. J. Hall, February 2l, 1882, No. 254,007, and lay no claim toanything therein shown.

W'hat I claim is-d 1. In a furnace, a wall having a Hue with which thedues of the boiler communicate at their forward ends, acombustion-chamber located under the forward end of the boiler, an arch,K, abutting against the front Wall of said chamber, midway thereof', andextending over the front half, or there-about, of the stationary grate,`and a bridge-wall, substantially as described.

2. In a furnace, the combination, with a stationary grate, of adumpinggrate consisting ofan L shaped grate-section pivoted by the endsof its longer arms to a support, and by the ends of the shorter arms toa supporting bar or plate pivoted beneath said dumping-grate,substantially as described.

3. In a furnace, the combination, with a stationary grate, of adumping-grate consisting of an L-shaped grate-section pivoted by itslonger arms or bars to a rigid support, and by itsshorter arms to a baror plate having pivotal support beneath said grate, and a connecting-barpivotally attached to the supporting-bar, substantially as described.

4. In a furnace having a free combustionchamber adapted to permit directradiation of heat from the fuel-bed against the under surface oftheboiler', and an inclined arch, K, located in the front portion of thecombustionchamber and about midway between the top thereof and thegrate, the front of said arch abutting against the front wall of thecom- Abustion-chamber to form a coking-oven, substantially as described.

In testimony whereof I sign this specifica tion in the presence of twowitnesses.

ABSALOM BA CKUS, JR.

Witnesses:

N. S. WRIGHT, M. B. ODOGHERTY.

